Syringe cartridge



Dec.21,1937. G NHEiN 2,102,704

' lSYRINGE CARTRIDGE v Filed June 10, 1935 .y T ,r l l I2| m z ,"l T lm"`x` I v I l was IN VEN TOR.

. ATTORNEY Patented Dec. 21, 1937 l George N. Hein, San Francisco,Calif.

Application June 10, 1935, Serial No. 25,791

3 Claims.

'I'his invention relates to a syringe cartridge and more particularly toan improvement in the construction-of a syringe cartridge of the type inwhich liquids such as medicaments may be pre- -pared in sealed form in acartridge and an injection needle attached directly to the cartridge by.puncture of a resilient closure member thereof.

Among the objects of the invention are to provide a syringe cartridgehaving va closure member adapted to seat within the discharge end of avial body and so constructed as to be self-retaining Within the vialbody.

Another object is to provide in a syringe cartridge a 'combined closuremember and supportin member for an injection needle.

Another object is to provide an end closure member for a syringecartridge having means for supporting the base or hub of an injectionneedle and which provides a resilient flange against whichthe needle hubmay seat or which may serve as a washer or bumper when the vial body isused in a metal syringe frame.

A further object is to provide, in a puncturable closure member, meansto prevent the closure member from sliding inwardly upon puncturethereof by insertion of a needle cannula therethrough.

With the foregoing and other objects in view, all

of which will be more apparent as this description proceeds, theinvention is exemplified in one preferred form in the novel constructionand combi.- nation of parts hereinafter described, illustrated in theaccompanying drawing, and pointed out in the claims hereto appended, itbeing understood that various changes in the form, proportion, size anddetails of construction of the apparatus may be resorted to within thescope of the appended claims without departing from the spirit orsacriiicing any of the advantages of the invention.

In the drawing:

Fig. 1 is a longitudinal view, partly in section, of a` -syringecartridge embodying a preferred form of the invention.

Fig. 2 is a longitudinal view partly in section r of a modified form ofthe invention.

Fig. 3 is a longitudinal View partly in section of another embodiment ofthe invention.

Fig. 4 is a longitudinal view partly in section illustrating anotherembodiment of the invention.

Referring to the drawing in which like characters of reference indicatecorresponding parts, I indicates generally a tubular vial or cartridgebody generally cylindrical in form having an open iilling end IIto-receive a plunger I2. After the cartridge is filled the open end IImay be closed end of the tube of the closure member.

' by a slidable cork I3 of any suitable type but preferably, asindicated herein, hollowed-out as by a concavity in its side walls as atI4. The opposite end of the vial body which may be termed the dischargeend is provided with a discharge opening I5 at which the walls of thevial body are flanged radially inwardly as indicated at I6 providing ashoulder. Before the vial body is filled a discharge closure membergenerally indicated I'I is `mounted Within the vial body at thedischarge end opening so as to close the same and provide a sealingmeans.v As is obvious from the drawing, the discharge closure member IIis inserted fromfthe filling end I I and is pressed into engagement withthe inturned flange I6 at the discharge end so that the major part of'the body of the closure member I'I is within the vial body for tightsealing purposes. This closure member is of resilient material and istubular, as indicated at I8, except for a wall I9 of the resilientmaterial which normally maintains the tube closed but is puncturable `byone end of an injection needle sharpened at both ends, one end of whichmay be inserted through the opposite The Wall I9 is recessed from theinner end of the closure member so that when the needle penetrates thewall I9 the point of the needle will lie Within the recess and will notbe injured by the depression of the opposite closure member I3 uponmanipulation of the plunger I2. 'The tube portion. I8 of the closuremember I'II is adapted to receive therein one end of a needle supportingmember 20. In Figs. 1, 3, and 4 this needle supporting member 2U isillustrated as a substantially rigid nipple having one end embedded inthe resilient body of the closure member and extends therefrom providinga free end having threads thereon to which the hub 2| of the needle maybe 'threadedly connected.

In Fig. 2 the tubular portion IB of the closure member is itselfthreaded as at 22 to receive therein a complementary threaded portion 23of the needle hub member 2|.

The forming of the vial body radially inwardly at the discharge endopening makes the closure member self-sustained against blowing outwardupon operation of the,syringe. Means are also providedv to prevent theclosure member from `being pushedv inwardly when the needle ls'inserted.'In Figs. 1 and 2, said means consists of a radially outward ange 24which provides a groove into which the inwardly formed wall I6 of thevial body engages so that the flange 24 is disposed exteriorly of theinwardly formed portion of. the' vial body and in this connection servesto prevent the closure from sliding inwardly upon insertion of theneedle through thepuncturable wall I9, provides a washer to prevent anyleakage arou d the needle hub 2I, provides'a bumper for y the needle hubto prevent fracture of the inwardly turned Wall which is particularlyadvantageous in glass syringe bodies, and'also provides a resilientwasher or bumper when the tubular body or vial is dropped into a metalsyringe frame in case it is desired to use it in that form. Also,because of its resilience, it is compressed by the needle hub tightlyabutting it, and thereby serves as an expandible friction means orfriction lock to pre-A vent the needle and hub from inadvertentlybecoming loose at its mounting. In Figs. 3 and 4 the hub 2| of theneedle seats upon a portion 25 of the closure member which protrudesthrough the opening I5 and thus serves as a washer and bumper in thesame manner as the flanges 24 in Figs. 1 and 2. However, in Figs. 3 and4 the means to prevent the inward sliding of the closure member isformed in the vial body, in Fig. 3 being indicated as an inwardly formedannular groove 26 through which the closure member will slide by reasonof its resilience. 'I'he diameter of the vial body at this groove 28 ispreferably greater than the diameter of the opening I5, or in otherwords the shoulder I6 extends radially inwardly to a greater extent thanthe inwardly formed groove 26 since the pressure against'the shoulder I6in the operation of the syringe is greater than the rearward pressure onthe closure member for the purpose o1' puncturing the wall I2 with theend of a needle.

In Fig. 4 the means for preventing the rearward movement of the closuremember I'I consists of an outwardly formed bead 21 which provides aninwardly opening groove 28 in the inner wall of the vial body. Theclosure member II is preferably formed with side walls which are con=cave as at 29 which provides an edge 30 at the inner end thereof whichreadily seats in the groove 28, thus resisting the pushing inwardly ofthe closure member when the needle perforates the wall I9.

Having thus described my invention, I claim:

1. A syringe cartridge including an elongated tubular Vial body havingan opening at a filling end for receiving a lplunger and having adischarge end opening, a closure member for closing said filling endan'd .being snugly slldable longitudinally of the vial body, a dischargeclosure member of resilient material mounted at the discharge endopening of the vial body, said last mentioned closure member beingtubular and having a puncturable wall of said resilient materialnormally closing said tube, said last mentioned closure member having atits outer end portion means for releasable mounting thereto of aninjection needle hub in abutting contact with the closure member and iniixed relation against longitudinal pressure within the vial body whenthe puncturable wall has been punctured by an injection needle, saidcartridge including means for maintaining said discharge closure memberagainst sliding longitudinally inwardly of the vial body, and the saiddischarge closure member being extended beyond the confines of the vialbody and providing a resilient irictional grip bumper and sealing washeragainst which the hub of a needle may abut when mounted to thecartridge.

2. A syringe cartridge including an elongated tubular vial body havingan opening at a filling end for receiving a plunger and having adischarge end opening whereat the wall of the said body is flangedradially inwardly, a closure member for closing said filling end, adischarge closure member of resilient material mounted at the dischargeend opening of the vial body, said last mentioned closure member beingtubular and having an integral puncturable wall of said resilientmaterial intermediately spaced from the ends of the tube and normallyclosing said tube, said cartridge having at its discharge end portionmeans adapted for releasable mounting thereto of an injection needle hubin abutting contact with the resilient closure member and in xedrelation against longitudinal pressure within the vial body when thepuncturable wall has been punctured by an injection needle, the saidcartridge including means for resisting the inward movement of saidclosure member longitudinally of the vial body and the said dischargeclosure member providing a resilient frictional grip bumper and sealingwasher against which the hub of the needle abuts when mounted to thecartridge.

3. A syringe cartridge including an elongated tubular vial body havingan opening at a illling end for receiving a plunger and having adischarge end opening whereat the wall of the said body is flangedradially inwardly, a closure member for closing said lling end and beingsnugly slldable longitudinally of the vial body, a discharge' closuremember of resilient material mounted at the discharge end opening of thevialv body, said last mentioned closure member being tubular and havingan integral puncturable wall of said resilient material intermediatelyspaced from the ends of the tube and normally closing said tube, saidlast mentioned discharge closure puncturedA by an injection needle, thesaid dis v charge closure member providing a resilient sealing washerand frictional grip bumper against which the hub of the needle may abutwhen mounted tothe closure member.

GEORGE N. HEIN'.

